oj.uz

Submission #670456

# Submission time Handle Problem Language Result Execution time Memory
670456 2022-12-09T07:16:57 Z Sohsoh84 The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 2749 ms 144468 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pll;

#define all(x)			(x).begin(),(x).end()
#define X			first
#define Y			second
#define sep			' '
#define endl			'\n'
#define debug(x)		cerr << #x << ": " <<  x << endl;

const ll MAXN = 2e3 + 10;

int G[MAXN][MAXN], n, m, ans, vis[MAXN][MAXN], mx, mn;

void add_cell(int x, int y, int dx, int dy) {
	if (x <= 0 || y <= 0 || x > n || y > m) return;
	if (vis[x][y]) return;

	vis[x][y] = true;	
	if (!mn) mn = mx = G[x][y];
	mn = min(mn, G[x][y]);
	mx = max(mx, G[x][y]);

	add_cell(x + dx, y, dx, dy);
	add_cell(x, y + dy, dx, dy);
}

inline void solve(int dx, int dy) {
	mx = mn = 0;
	vector<pair<int, pll>> vec;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			vec.push_back({G[i][j], {i, j}});
			vis[i][j] = false;
		}
	}

	sort(all(vec));
	ans = min(ans, vec.back().X - vec.front().X);
	int l = 0, r = int(vec.size()) - 1;

	while (l < r) {
		auto [xl, yl] = vec[l].Y;
		auto [xr, yr] = vec[r].Y;	
		if (vis[xl][yl]) {
			l++;
			continue;
		}

		if (vis[xr][yr]) {
			r--;
			continue;
		}

		add_cell(xl, yl, dx, dy);
		while (l <= r) {
			auto [xl, yl] = vec[l].Y;
			auto [xr, yr] = vec[r].Y;

			if (vis[xl][yl]) {
				l++;
				continue;
			}

			if (vis[xr][yr]) {
				r--;
				continue;
			}
			
			break;
		}

		if (l <= r)
			ans = min(ans, max(mx - mn, vec[r].X - vec[l].X));
	}
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cin >> G[i][j];
		}
	}

	ans = numeric_limits<int>::max();
	solve(1, 1);
	solve(1, -1);
	solve(-1, 1);
	solve(-1, -1);
	
	cout << ans << endl;
	return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 492 KB Output is correct
16 Correct 25 ms 3504 KB Output is correct
17 Correct 20 ms 3764 KB Output is correct
18 Correct 21 ms 3792 KB Output is correct
19 Correct 20 ms 3780 KB Output is correct
20 Correct 18 ms 3500 KB Output is correct
21 Correct 28 ms 3892 KB Output is correct
22 Correct 21 ms 3844 KB Output is correct
23 Correct 21 ms 3908 KB Output is correct
24 Correct 18 ms 3592 KB Output is correct
25 Correct 21 ms 3904 KB Output is correct
26 Correct 22 ms 3900 KB Output is correct
27 Correct 20 ms 3864 KB Output is correct
28 Correct 21 ms 3908 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 492 KB Output is correct
16 Correct 25 ms 3504 KB Output is correct
17 Correct 20 ms 3764 KB Output is correct
18 Correct 21 ms 3792 KB Output is correct
19 Correct 20 ms 3780 KB Output is correct
20 Correct 18 ms 3500 KB Output is correct
21 Correct 28 ms 3892 KB Output is correct
22 Correct 21 ms 3844 KB Output is correct
23 Correct 21 ms 3908 KB Output is correct
24 Correct 18 ms 3592 KB Output is correct
25 Correct 21 ms 3904 KB Output is correct
26 Correct 22 ms 3900 KB Output is correct
27 Correct 20 ms 3864 KB Output is correct
28 Correct 21 ms 3908 KB Output is correct
29 Correct 2653 ms 108400 KB Output is correct
30 Correct 2570 ms 110420 KB Output is correct
31 Correct 2711 ms 110512 KB Output is correct
32 Correct 2736 ms 110548 KB Output is correct
33 Correct 2351 ms 121924 KB Output is correct
34 Correct 2749 ms 110560 KB Output is correct
35 Correct 2497 ms 144468 KB Output is correct
36 Correct 2158 ms 139292 KB Output is correct
37 Correct 2550 ms 127976 KB Output is correct